Câu số 41:
Why are active hackers probably considered more dangerous than passive ones?
Câu số 42:
What does “plus” in “password-plus” probably mean?
Câu số 43:
Which of the following does the passage mainly discuss?
Câu số 44:
According to the passage, the drilling of the glacier in eastern Antarctica was important because it__ .
Câu số 45:
The phrase "tantamount to" in line 5 is closest in meaning to___.
Câu số 46:
According to the passage, scientists used isotopes from the water of the ice core to determine which of
following?
Câu số 47:
The word "remarkable" in line 12 is closest in meaning to ___.
Câu số 48:
The passage implies that the warmest temperatures among the periods mentioned occurred ___.
Câu số 49:
According to the passage, the Carboniferous period was characterized by____ .
Câu số 50:
The passage explains the origin of which of the following terms?